Can a partner be expelled if so how what are the rights and liabilities of an expelled partner?

Yes. A partner can be expelled (called dissocation under the Uniform Partnership Act or Uniform Limited Partnership Act) for (1) doing something unlawful or against the best interests of the partnership; or (2) a violation of the partnership agreement. The partner continues to be liable for his or her acts or omissions that occured before dissociation, or for proximately-occuring consequences thereafter, and may have rights to a distribution of a partnership share at winding up of the partnership.